CVSS 4.0
8.7 highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NCVE-2026-121386
High (8.7) in freerdp freerdp. EPSS 0.3% estimated probability of exploitation activity in the next 30 days.
On this page
FreeRDP before 3.32.2 contains a denial of service vulnerability in WinPR's winpr_read_png_from_buffer() and winpr_convert_from_jpeg(), which lack libpng/libjpeg error handling. A malicious RDP server or MITM can offer a malformed PNG or truncated JPEG clipboard payload, causing the client to abort or exit.
Severity
CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- EPSS
- 0.3% estimated probability of exploitation activity in the next 30 days; 19th percentile. Scored 2026-11-04. A forecast for this CVE across the internet, not for your own systems.
- CWE
- CWE-248 Uncaught Exception
- OWASP Top 10
- A10:2025 Mishandling of Exceptional Conditions
- Published
- Modified
- Record from
- the NVD, synced
Ask an AI about this CVE
Show the prompt
Explain CVE-2026-121386 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-121386?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-121386?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-121386 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| FreeRDP | before 3.32.2 |
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 12 | freerdp2 | no fix listed | DEBIAN-CVE-2026-121386 |
| Debian | 13 | freerdp3 | no fix listed | DEBIAN-CVE-2026-121386 |
| Debian | 14 | freerdp3 | 3.32.2+dfsg-1 | DEBIAN-CVE-2026-121386 |
From the distributions' data via OSV.dev: the Debian Security Tracker. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian.
Red Hat
Red Hat rates this Important.
This vulnerability is rated as an Important impact for Red Hat products because an untrusted remote desktop host or network intermediary can terminate the client session unexpectedly without prior authentication. Although this defect causes application termination rather than remote code execution, it directly impacts the availability of user sessions in enterprise environments. Exploitation requires an established connection to a malicious RDP endpoint or interception by an adversary on the network path processing shared clipboard content.
Disable clipboard redirection for RDP connections.
When launching sessions with the xfreerdp command-line utility, explicitly disable the clipboard channel:
```
xfreerdp -clipboard /v:<server_address>
```
When connecting via graphical clients, disable clipboard synchronization within the respective connection profile preferences.
Caveats:
Disabling clipboard redirection prevents transferring text, images, or files between the local system and the remote session.
Warning:
Changes apply to new connections; any active RDP sessions must be disconnected and restarted for the setting to take effect.
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | freerdp | Affected | |
| Red Hat Enterprise Linux 6 | freerdp | Out of support scope | |
| Red Hat Enterprise Linux 7 | freerdp | Affected | |
| Red Hat Enterprise Linux 8 | freerdp | Affected | |
| Red Hat Enterprise Linux 9 | freerdp | Affected |
Contains Red Hat Security Data © Red Hat, Inc., licensed under CC BY 4.0. Source: https://access.redhat.com/security/data. Modified: reformatted. Red Hat's page for CVE-2026-121386.